/*
 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#include "tcpecho.h"
#include "lwip/opt.h"

#if LWIP_NETCONN

#include "lwip/sys.h"
#include "lwip/api.h"

#define TCP_ECHO_PORT   8888
/*-----------------------------------------------------------------------------------*/
static void
tcpecho_thread(void *arg)
{
    struct netconn *conn, *newconn;

    LWIP_UNUSED_ARG(arg);

    conn = netconn_new(NETCONN_TCP);
    netconn_bind(conn, IP_ADDR_ANY, TCP_ECHO_PORT);
    netconn_listen(conn);

    while (1)
    {
        newconn = netconn_accept(conn);
        if (newconn != NULL)
        {
            struct netbuf *buf;
            void *data;
            u16_t len;

            while ((buf = netconn_recv(newconn)) != NULL)
            {
                err_t err = ERR_OK;

                do
                {
                    if (err == ERR_OK)
                    {
                        netbuf_data(buf, &data, &len);
                        err = netconn_write(newconn, data, len, NETCONN_COPY);
                    }
                }
                while (netbuf_next(buf) >= 0);

                netbuf_delete(buf);
                if (err != ERR_OK)
                {
                    break;
                }
            }

            netconn_close(newconn);
            netconn_delete(newconn);
        }
    }
}
/*-----------------------------------------------------------------------------------*/
void
tcpecho_init(void)
{
    sys_thread_new("tcpecho",
                   tcpecho_thread,
                   NULL,
                   LWIP_STK_SIZE,
                   DEFAULT_THREAD_PRIO
                   );
}
/*-----------------------------------------------------------------------------------*/

#endif /* LWIP_NETCONN */
